Hmmmm (good question, as usuall),

1. I would assume Fuel Injected since the intake charge appears to be more
fuel "loaded" during the first part of the intake cycle (???) and not
uniformly atomized.  I assume the intake charge composition of a carbureted
engine would be more consistent throughout the intake cycle.

1b. Unless, the visual intake effect is related to the velocity of the
intake charge which is highest later in the intake cycle (???).  Then - I'm
not sure.

2. The entire exhaust cycle is not shown.  However, I find it interesting
that at the beginning of the intake cycle the exhaust value appears to be
already fully closed.  I would normally expect those cycles to overlap some.
Perhaps this is a turbo-charged auto engine with a non-overlapped cam(???).

3. Any insight on the yellow combustion flame which appears mostly on the
right side of the frame (perhaps around the intake value)?  I wouldn't think
that any fuel or air would be leaking "IN" during the high pressure
combustion stroke.

4. There is also a very faint white "ghost" that appears to "rotate" on the
face of the intake value during the compression, combustion, and exhaust
stroke(s).  I can't imagine the value is turning at that point (???).

Rick Titsworth
APS Grad Jan 06


-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of
Walter Atkinson
Ok, question time!  By looking at the video, how can you tell if the engine
is injected or carbureted?
Walter

On Oct 5, 2007, at 2:31 PM, Rob Logan wrote:

video of a cyl firing
http://video.google.com/videoplay?docid=-5815350492893860613